Transmission gearing



oct. 29,1929. w. H. WYMAN TRANSMIS S ION GEARING 1925 4 Sheets-Sheet l Filed June 12,

A T0RNE15 UCL 29, 1929. w WYMAN 1,733,290

TRANSMISS ION GEARING Filed June 12,: 1926 4 Sheets-Sheet 2 INVENTOR.

A TTORNEYS W. H. WYMAN TRANSMISSION GEARING Filed June l2. 1926 4 Sheets-Sheet 3 NVENTOR MAQ/7 )LA TORNEYS Get. Z'J, 1929. w. H. WYMAN L733290 TRANSMISSION GEARING Filed June l2, 1926 4 Sheets-Sheet 4 IN VEN TOR.

A TTORNEYS Y Sri Patented Oct. 29, 1929 UNITED `.STA TESv PATENT; OFFICE WIIiLIAivr'117. WYMAM'OF os'HxosH, WISCONSIN; EMMA WYMAN, EXECU'IRIX OF SAID WILLIAM n. DncEAsEn, .AssIGNOaor ONE-HALF To PINE-Inma MA- CHINE-co., or OSHKOSH, WISCONSIN, A cORronATIoN on WIsooNsIN TRANSMISSION GEARING- Application lfiled. .Tune 12,

:This -Iinvention relates to "transmission `gearing andmore/especially to an automobile transmission and has for one of its objects to providela` changesp'eed gearing similar to thel well know-n .sliding :gear transmission but inwhichthe various gears are` constantly in mesh and are providedl with suitable clutches -or selectinfgithe particular set of gears to produce thespeed desired.

'10 Afiirtherobject of the invention is to pro- V which will bel-simplein construction, com- 'Yparatively inexpensive to manufacture and more eiicient in use thant'hose which have been heretofore.' proposed.

'Witli the above and otherV objects-in view which will appear vvas the description proceeds, the inventionl consists'in'thelnovel deltails 'of construction and combinations of 'partsmore fullylhereinaiter described and particularly pointed out'in Vthe appended claims.

Reierringto the accompanying drawings in which like reference characters designate like 1 parts in all the views z Figure 1 isi-'acentral' vertical sectional view partly in kelevation 'of a 'change speed transmission gear YVconstructed inl accordance with the present invention;

Fig. 2 is a transverse sectional View o't jthe partsf'shown 1in Fi'g.-'1,*-ftaken A'approximately on the plane 2indicated "by I the line v2-#2 of said iigure;

Fig. f3fis a top ,-planvievv of the transmission gear shown in Fig. A111, the fg-ear vshitting lever being `omitted and,

1926. serial No. 115,539.

broken away of the transmission and showing the mechanism employed for positively shifting one of the clutch members into and out of engagement when the transmission is shifted to and from high speed.

'Referring more particularly to the said drawings, 5 indicates a suitable housing for the transmission gearing, provided with the end plates or heads 6 and?, in the former of which is suitably journalled the drive shaft 8 leading from the usual clutch 9 associated with the fly-wheel 10 of the motor not shown. The said main or drive shaft 8 extends a considerable distance within the easing or housing 5 and is provided with a reduced end 11, which' isjournalled within a bore 12 provided in the end of the driven shaft 13 which isrjournalled in suitable bearings 14 in the .er or'jac'k yShaft 22, which-'shaft isjournalled =1nf suitable bearings 23 and 24 carried by the Ve'n'dr plates or' heads 6 and T, respectively.

The gears 16 and 17 mesh respectively with gears 25 and 26 which are likewise rigid with thelj ackshaft 22,and as will be readily understood, constitute the low and intermediate drives'of the transmission. The gears 15, 19 and 21 as will also be readily understood, constitute the reverse drive.

`The gears 15 and 16, are respectively provided with one way'toothed clutch members 28 and 29 which are adapted to co-act rcv`spectively with the companion Clutch mem- Vbers 30 and 31,'oi1 a clutch collar 32 which is splined upon the drive shaft 8 by means of a key or keys 33.

In like manner the'gear .17 is provided with 'acluteh member 34 which is adapted to coact with. 4`a-comi'jafniclini' clutch-member 535 carried by a clutch collar 36 splined upon the drive shaft 8 by the key 37. The said clutch collar 36 also has a second clutch member 38 which is adapted to co-act with a companion clutch member 39 formed upon the inner end of the driven shaft 13, (see Fig. 1).

Rotatably journalled upon the said inner end of the shaft 13 is a gear 40, the said gear beingfreely rotatably upon the said shaft and meshing with a companion gear 41 rigid with the jack shaft 22. The said gear'4() is provided with a hub 42 in which is formed a clutch member 43 adapted to be engaged by aV companion clutch member 44, carried by a clutch collar 45 which is splined upon the inner end of the driven shaft 13 by means of the key 46. f

Mounted within the casing or housing 5 above the main shaft 8 and the gears carried thereby is a pair of longitudinally extending rods or shafts 48 and 49 upon the former of which is slidably mounted a clutch member actuating sleeve 50 while upon the latter of which is mounted a pair of clutch actuating sleeves 51 and 52. rJ'he sleeve 50 is provided with a downwardly ext-ending yoke 53 which engages the clutch collar 32 whereby the latter may be shifted longitudinally upon the shaft 8 to bring its clutch members 30 and 31 Vinto and out of engagement with their companion clutch members 28 and 29 at will. In

like manner, the sleeve 51 is provided with the downwardly extending yoke 54 engaging the clutch collar 36 and the sleeve 52 is provided with a yoke 55 engaging the clutch collar 45.

The sleeves 50, 51 and 52 provided with suitable housings 56, 57 and 58 respectively for enclosing the well known spring pressed detent for holding the sleeves in set positions and t-he said sleeves 50 and 51 may be readily shifted longitudinally upon their respective rods 48 and 49 by the usual selective gear shifting lever 60 mounted as at 61 for lateral as well as for forward and backward movement whereby the pins 62 carried by the low- Vce er end of the said lever may be caused to engage and disengage the bifurcated upperV end 63 of the shifting levers 64 and 65 respectively, which levers in turn engage the studs or pins 66, and 67 carried by the sleeves 50 and 51.

From what has been thus far disclosed, it willv be readily apparent that the transmission will operate as follows:

Suppose for example, itis desired to shift the mechanism into low gear,- through the gear shifting lever 60, the sleeve 50 will be movedV toward the right as viewed in Fig. 1 to bring the clutch members 31 and 29 into'engagement whereupon motion from the drive shaft 8 will be transmitted through the clutchcollar 32 tothe gear 16 then to the gear 25, jack shaft 22, gear 41, gear 4() and i clutch members 43 and 44 to the clutch collar 45 and to the driven shaft 13. During such operation, of course, the various gears 15, 19, 21, 17 and 26 will all be rotated inasmuch as the gears 21, 25, 26 and 41 are all fast to the jack shaft whereas the gears 15 and 17 are loose upon the main shaft.Y

The drives for reverse and intermediate gear are secured in like manner and it is not thought necessary to describe themrin detail. In the high or directV drive, however, when the sleeve 51 is shifted to the right as viewed in Fig. 1, by means of the gear shifting lever 60 to move its clutch collar 36 so as to bring the clutch members 38 and 39 into engage' ment, there will be a direct drive from the shaft 8 to the shaft 13 inasmuch as the clutch member 38 is keyed to the shaft 8 while the clutch member 39 is rigid with the driven shaft 13. lVhen the parts are in this position it is desirable to disengage the various gears within the transmission in order to relieve the motor of the necessity of turning all of said gears idly in the transmission lubri cant and to this end the clutch'collar 45 is also shifted to the right as viewed in Fig. 1, through the medium of its yoke 55 and sleeve 52 to disengage the clutch members 43L and 44, Vwhereby the gear 40 is left free of the driven shaft.

The right hand movement of the sleeve 52 Y f is readily accomplished through the engagementtherewith of the sleeve 51, the said sleeves being mounted end to end upon the said rod 49. l/Vhen, however,rit is desired to disengagethe direct drive upon movement of the sleeve 51 toward the left as viewed in Fig. 1, some means must be provided for returning the sleeve-52 so as to reengage the clutch members 43 and 44.

The particular means employed for this purpose is illustrated in Fig. 4 and comprises a pair oflinks 70, only one of which is shown in the said figure, which are pivoted at one end as at 71 to the sleeve 52 and are provided at their other ends with the open slots or recesses 72 adapted to engage the pins or studs 73 carried by the sleeve 51. Suitable rollers 74 and 75 are supported from the casing or housing 5 and engage the said links substantially as shown to cause the said links at the proper time to engage and disengage the pins 73 carried by the sleeve 52 whereby the said sleeve may be shifted from the neutral position as shown in Fig. 1, toward the left as viewed in said figure, to bring the clutch members 34 and 35 into engagement to secure the intermediate gear ratio.

It will thus be seen that the present invention provides a change speed transmission in which the gears themselves are constantly in mesh and are provided with suitable oneway clutches whereby the different speed ratios may be obtained and that upon the similar or high speed there is a direct.` drive between the drive and driven shafts with the counter or jack shaft and all of the various Ofears remaining stationary.

Vhile one form of the invention has been illustrated, it is obvious that those skilled in the art may vary the details of construction as well as the precise arrangements of parts without departing from the spirit of the in vention and it is, therefore, not wished to be limited to the above disclosure except as may be required by the Claim.

Vhat is claimed' is:

In a transmission gearing of the class described, a drive shaft, a` driven shaft and a counter shaft; a plurality of sets of gear connections between said drive and counter shafts; clutch members for selectively engaging' and disengaging the drive shaft gears to and from said shaft; means for shifting certain of said clutch members; a Clutch member rigid with said driven shaft adapted to eoact with one of said first named clutch members to produce a direct drive from said drive to said driven shaft; a gear connection between said counter and driven shafts, the gear upon said driven shaft being freely rotatable thereon; clutch means for engaging and disengaging said last named gear with said driven shaft; means for shifting said last named clutch means; a latch link pivotally carried by said last named shifting means; a pin carried by the shifting means for the direct drive Clutch; and means for causing said link to engage and disengage said pin to couple and uneouple said two last named shifting means upon certain predetermined movements thereof.

In testimony whereof, I affix my signature.

VILLIAM II. WYMAN. 

